Spring.



, -1 ATENTBD MAR. e, 17906. F. J. MERCER.' A'

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, l ww '40 roller-cage- Fig. 6 represents a per'stctive, rulli)v oftransverse rollers.

FREDERICK lJ. MERCER, OF HYDE PARK, MASSACHUSETTS.

SPRING.

Unrrsn STATES PATENT OFFICE.

No. 814,387. Specification'of Letters Patent. Patented March 6, 1906.

Application ned sepiembr ze, 1905. serial No. ziazu. I

To all whom t may concern: antifriction members- TheV rollers 15v are`Be it known that I, FREDERICK JMERQER, greater inrdiameter than thewidth ofthe a citizen of the United States of America, sides 16 of thecage 14', so that the plates 1.0i and a resident of Hyde Park, in thecounty l 13 bear wholly upon the rollers 15 and do ntl'iss 5 'ofNorfollandStateoflliassachusetts, (whose Contact with t e -ca' e 14.`By-this meansf.` post-oiiice address li's 54 Gordon avenue, in t ere iscom arat'ive y nofriction between ysaid city,) have invented certain newand thevarious p ates 10 13, and when pressure is useful Improvements inSprings, of which the brought to bearthereon to cause them to following1s aspecitication. ymove lengthwise of one another the plates 6o o Thisinvention relates to carriage or Wagon bear u on the rollers..15,` whichare, free to s )rings formed of a series of overlaid elastic move albout.their axes. These rollers'15 are llates vwhich are clamped or4otherwise 'se. provided with trunnions 17, having 'beari s curedtogether midway of their length and 18 in the inner walls 19 of thesides 16 ofthe are adapted to move lengthwise of each other cage 14,said cage 14 being rovided Vwith 65' f5 w en moved from their normalposition. v an opening .20 through its we 21,-in whichv AThe object ofthe present invention is to each roller is adapted to move. reduce tocaminimum the frictionbetween One ofthe inner inclined walls 19 isada tthevarious latesA when sliding one u on the ed to yield for the insertionof the tunmon other, this iliictionjbeing'considerab e when 17 and tospringback into its normalv osi- 2o great wei ht is brought to bear uponsaid tion afterinsertlon' to form a bearing t ere`. J sprifigs. hegreater part of this friction is for and prevent accidental displacementof overcome by the present invention, which said rollers. consists inproviding a cage with antifriction 'A r'illin -piece 22 is insertedbetween the members,.which is interposed between the inner walF s 19midway, of the length'of said 7 5V e 5 successive plates of the spring.cages 14 to provide a suitable bearing-sur- `Theinventionurther'consists ot'certain ,face for the same around thebolt-12 Y- novel features of construction and arrange- It is believedlthat the advantages of such me'nts'of parts, which will be readilyunderconstruction of spring stood by, re elfence to the description oithe the o eration so obvious as to need no fur- `8o 3o 'drawings and tothe claims to behereinafter ther escription.

given. Having thus described my invention, VI Of the drawings, Figure 1represents an claim` elevationA of a spring embodying the features 1. Aspring comprising a plurality of over-v Qf this invention. Fig. 2represents a plan laid plates, and a cage interposedibetween 85 3 5 ofsame. Fig. 3 represents an inverted plan two of said plates andprovided'with antiof same with the under plate removed. Fig. frictionmember-s. y 4 represents a section on line 4 4 on Figs. 1 2. A springcomprising a plurality of overand 3, drawn' to a greatlyeenlarged scale.laid plu es, and aca fe interposed between Fig. 5'represents a plan of asection of the two ol' said plates and provided with a; plu. 9'0 `Viewof a section of the roller-cage w1 1 .the 3. A spring comprising aplurality of over-A r rollers removed, and Fig. 7 represents unfjjelof ginterposed between vation of a roller. v two oi' said plates andprovided throughout in the drawings, 10is the main li1teoithe its lengthwith transverse rollers. 45 spring'provided at either end with aloop 11i' Y spring comprising a series of overlaid' l0r securing the same tethe supported mem` Aplates n combination with a .,plurali ty of' bers.The plate 10 has Vsecured thereto mide transverse rollers interposedbetween said way of its length by the bolt 12 a plurality of plates, anda cage for holdin saidrollers hav;A .shorter plates 13. vIn-terposedbetween the mg sides oi a width-somew at less than he 11:2 5o plates 10and 13 are cages 14, each provided diameter oi the said rollers. with' aplurality ofrollers 15 or other suitable 5,l spring comprising aseriesof-.over

plates in combination with' a plurality ef Signedbymeet,Bostomll/assachusetts,this transverse rollers interposed between sind18th dey ol September, 1905.

plates, and having trunniqns at either end, FREDERNK J. MERCER and ecage for holding sind rollers, having 5 inner spring side walls adaptedto yield to 'Witnessesz ermit the insertion of sii-id rollers, and then-WALTER E. LOMBARD, retn theminpesition. EDNA C, CLEVELAND.

